Trigger device for firearms.



' R. PROMMER. TRIGGER DEVICE FOR FIREARMS. APPLICATION FILED NOV. 5,1907.

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APPL IOATION FILED NOV. 5, 1907.

' Patented Feb. 28; 1911.-

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R. FROMMER. TRIGGER DEVICE FOR FIREARMS. APPLICATION FILED NOV. 5, 1907.

985,1 56. Patented Feb. 28, 1911.

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TRIGGER nnvrcn vnon FIREARMS.

To all whom it may concern:

Be it known that I, RUnoLF FROMMER, manager, subject of the King ofHungary, residing at Budapest,Austria-Hungary, have invented certain newand useful Improvements .in or Relating to Trigger Devices for.

Firearms, fication. v

This-invention relates to a trigger device for fire arms by means ofwhich either a single shot can be fired by. pressing the trigger or thefiring continued as long 'as the pressure on the trigger is kept up, asdesired, either of the .two results being obtained by suitably operatinga change part.

The invention further relates to a safety of which thefollowing is aspecidevice which makes it possible to fire only.

when the breech-bolt is completely closed. 1

The trigger device which can be of different constructions is shown inthe accompanying drawings in- .two constructions. First for fire arms inwhich the trigger is operated by pulling with the curved finger and thenfor fire arms in which the firing is effected by means of a pressureexercised for instance on a .knob. It goes without saying that thedevice arranged for operation by pulling can be easily applied foroperation by pressure, and vice versa.

Figure 1 shows the trigger device with pulling movement put in forsingle firing.

Fig. 2 shows the same adjusted for continuous firing. Fig.3 is a view ofthe trigger mechanism from the under side, also show ing the settinglever. Fig. 4 shows the sear, and the-tumbler in plan and part of theframein section. Fig. 5 is a cross section on line .VV of Fig. 1. Fig. 6shows the trig ger device for pressure movement set for continuousfiring. Fig. 7 shows the same set for single firing. Fig. 8 shows thelan of the sear and tumbler, and portion 0 the:

frame in. section, this constructionbeing a j modification of that shownin Fig. 4.- Fig.

- ting lever and a partial section of the frame.

front of a projection 5 of the firing pin 6.

9 isa plan of the trigger arm and the set- Fig. 10 is a detail view .ofthe head of the firing pin of another construction.

, In the construction shown inn-Figs. 1-5, the sear 1 is pressed by thespring 2 against a stop 3, thenose 4 of the-sear being in The tumblerv 7iscontrol-led by a spring actuated pin 8 in such manner that its nose 9the Specilicationof Letters Patent. Patented Feb. 28, 1911. Applicationfiled November 5', 1907. Serial No.1 400,815.

- is pressed in front of the projection 5. The

two noses 4 and 9 are arranged side by side (Fig. 4) in such manner thatthe firing pin 6 r can be held fast by the two noses simultaneously.

As will be seen from Figs. 1 and 2, the sear 1 can be secured by asafety rod 32, the latter engaging under the sear, so that the lattercannot swing'out.

In order to enable the firing pin 6 to be cocked even when the sear isat half cock,

paw 33 (Fig. 10) in such amanner that the said pawl 33'moves out ,of theway of the sear, into the half cock position during the cocking of thefiring pin. The release of the sear 1. is efi'ected by the trigger 1Ocontrolled by a spring 11 and provided with a trigger pin 13 operated bya spring 12. The said trigger pin is provided with a part 15 projectinglaterally from the tri ger and guided in a slot 14 of the trigger Fig.3).

rojection 5 can be made into a spring.

Laterally of the trigger is-arranged the set- I ting lever 16 which isheld fast in two positions by means of a spring controlled look ing pin18 arranged in its knob 17. -.The

setting lever'is provided .inside the gun casing with two projections 19and 20 which. can be brought into engagement with the tumbler 7 or withthe projection 15 of the trig er pin.

If it is desired to fire single shots by means of the trigger device,the setting lever- 16 is placed-into the position shown in Fig.

1, its projection 19. forcing the tumbler 7 out ofreach of the firingpin projection 5 and holding it fast in this disengaged posi= tion. Theprojection 20 .comes into engage ment with the projection 15 of thetrigger pin 13, whereby the latter is slightly forced I back against theaction of the spring 12.. .Owing'to this forcing back of the triggerpin, the length ofthe trigger from the axis of rotation-'21 to theoperative edge 22 1s shortened to such an extent that, ,on thetriggerjbeing pulled, the edge 23, of the sear =1 springs back from theedge 22 as soon as the nose 4 releases the firing pin, so that the searl 'under the influence of the s ring'2 comes back to its position ofrest a ter the firing pin 6 has been released. 1 In that way the resultis obtained that the sear 1' .is at- .once ready again to seize thefiringpin and not to release it beforefagain being'pulled'.

L surface 25 when the breech-bolt is coming stops.

If the trigger 10. is again released after firing ashot, the trigger pin13 which is moved against the action of the spring 12, can again returnto its original position, so 5 that a new shot can be fired.

If it is desired to fire continuously with the said trigger device, thesetting lever 16 is .brought into the position shown in Fig. 2, itsprojection 19 becomingdisengaged from the tumbler 7, sr that the latteris brought by its spring actuated pin. 8 into engagement with 'andplaced in'front of, the firing pin projection 5. The firing pin 6 is,therefore, held simultaneously both by the nose 4 of the scar and thenose 9 of the tumbler, as long as the trigger is not pulled.' Thetumbler 7 has a cam surface 24 which is depressed by a correspondingcam-surface 25 of the breech-bolt 26, whereby the tumbler 7 is releasedas soon as the breech-bolt is brought into the closed position.Accordingly when the bolt is completely closed the firing pin 6 is heldonly by the sear 1.

Owing to the shifting of the position of the setting lever 16 itsprojection 20 also became disengaged fromthe projection 15 of thetrigger pin 13 which is no longer limited by the projection 15 butexpands a little, 1 comes out from the trigger and-is limited only bythe slot 14 provided in the trigger. I If the trigger is pulled, a shotis fired, as, owing to the completely closed breech-bolt, the tumbler '7is in thedisengaged position and by pulling the trigger, the sear isreleased. The edge23 of the sear 1 can, however, no longer spring backfrom the edge 22-0f the triggerpin 13 as the length of the trigger'hasbeen slightly increased from the axis of rotation 21- to the edge 22,owing to. the release of the projection 15. The sear 1 is, therefore,.held out of engagement with the projection. 5 of thefiring pin as longas the pressure onthe trigger continues. After firing a shot,'thebreech-bolt," and with it also the cam surface 25, move. backward, .thetumbler is therefore again brought by its spring actuated pin-8 into theengaged position, it holds the firing pin fast again and is againautomatically released by the cam \pletel'y closed. This is repeatedas'long as the pressure on the trigger continues. On the trigger-beingreleased the sear comes into the path of the firing pin 6, and thefir-;.

The trigger device shown in Figs. 6-9 for pushing the trigger issubstantiallythe ,same as hereinbefore-described, onlysthe trigger isconstituted by an adjustabletrigger arm. The corresponding parts aremarked in the drawings with the same ref erence numerals as'in the firstconstruction. The trigger arm 27- is provided with a tongue 29' (Fig. 9rotatable about a pin 28 and provided wit ,axcam' surface 30. The

is brought by the projection 19 of the setting lever out of reach of thefiring pin projection 5. At the same time a projection 34 of the settinglever is brought into the path of the cam surface 30 of the tongue 29..When the trigger arm 27 is'pushed forward for the purpose of firing ashot, the sear is turned by the projection 33, so that the nose 4releases-the firing pin, and a shot-is fired. When arm 27 is now pushedforward, the tongue 29.is slightly depressed by the projection 34 whichslides along the cam surface 30, so that the edge 23 of the sear springsback from the edge 22 of the projection 33 the moment the nose 4 hasre-.

leased the firing pin.' The sear is then brought again by its spring 2inthe well known manner to its position of rest in which it is ready tocatch the firing pin in the well known manner. ger arm 27 is pulledback, the edge-22 moves ack in well known manner, the projection 33being turned downward about the pin 28. The sear thus holds the firingpin fast, as long as it is not pulled back again.

If it is desired to set the gun for continuous firing, the setting lever16 is turned into the position shown in Fig. 6. ;In that position of thesetting lever, the projections 19 and 34 become disengaged respectivelyfrom the tumbler 7 and the cam surface 30. In that way the tumbler 7 isbrought by its spring 8 within reach of the firing When the trig- I Ipin projection 5,, the said tumbler, like in the first constructionbeing automatically brought into action by -the' cam surfaces 25 and 24.At the advance of the-trigger arm 27, the tongue 29 is, however, nolonger pressed down sincethe projection 34 is not in engagement with thecam face30. The

edge 22 will not,'therefore, move out of the way of the edge 23, so thatthe sear 1 remains disengaged, and the firing, as already stated, willbe automatically continued as long as the pressure on the trigger armcontinues. v I

In the trigger device according to this invention, there is furtherprovided asafety device. which insures that the'firing shall be possibleonly whenthe breech-bolt is completely closed. To that end, the bottomedge'of the breech-bolt is provided with two inwardlongitudinalribs 35or the like (Figs. 1, 2, 5, 6 and 7) cooperating with two smalllaterally projecting ledges 36 or the like of the sear nose-4 and of thetumbler nose 9. When the sear and the tumbler are in engagement with thefiring pm projection 5,

, the ledges 36 are situated above theribs and prevent the noses" 4 and9 from being pulled down. The ribs 35 are interrupted at the point wherethe noses 4 and 9 are situated when the breech-bolt is closed, so thatthe noses 4 and 9 can come out from the breech-bolt at' this point. Inthat way neither the sear'nor the tumbler can release the firing pinunlessthe breech-bolt is completelfv closed. This safety' device can ofcourse be applied to any kind of fire arms.

In order that the sear and tumbler; after a shot ha been fired, canr'egaintheir original position to intercept the firing-pin'on theforward movement of the latter with the bolt,.'the ribs 35 are. alsorecessed at their extreme forward end, so that when the breech-boltreturns to its forward open position, the said recesses in the rib35fwill lie over the noses 4 and 9, permitting the'same to be returnedby their springs to their position in which they again engage with theprojection 5 of the firing pin.- j i In case'the' trigger device'hasonly one part releasing the firing pin, it can be provided on both sideswith ledges 36 or the like, or only on one side, the longitudinal ribs35 or the like being provided on the breech-bolt only at that point.

. I claim v 1. Trigger device, comprising in combination with thetrigger, a breech-bolt, a firing pin, a sear and a tumbler, the saidsear and tumbler having means to engage with the said firing pin, thesear being adapted to be disengaged from the firing pin by the trigger,and a cam-face on the breech-bolt adapted to cooperate with a controlledtrigger-pin, a firing pin, a sear hav ng means to engage with the saidfiring pin and lock the same in cocked position, a

each pulling-of the trigger.

engage upon the closing of the breech-bolt tumbler having means toengage with the projection on said trigger-pin, and a setting leveradapted to engage with said projection to retract the said trigger-pinand shorten the same, the trigger pin engaging the said sear withan edgesoas torelease-the said. sear and become disengaged therefromupon 4.Trigger device comprising in combinatio-n'witlr the trigger and 'amovable, springcontrolled trigger pin, a' breech-bolt, a firing pm, asear, a tumbler, the said sear and tumbler havm means to en a e wlththeisald g in means on said trigger pin to engage with the said sear andwithdraw it from its locking position, means on said breech-bolt to withsaid tumbler and withdraw it from its locking position, and a settinglever hav-- ing a projection adapted to engage with said tumbler andpermanently withdraw it from its locking position.

v 5. Trigger device comprising in combination with the trigger and amovable, springcontrolled trigger pin, a breech bolt, a fir ing pin, asear, a tumbler, the said sear and said firing pin, l0cking it in cockedposition, means on said trlgger-pin to withdraw the said sear from itslocking position, means on said breech-bolt, to withdraw, when closed,the said tumbler from its locking position, and means on saidbreech-bolt and-the said sear and tumbler respectlvely to prevent thewithdrawal of either the said sear or tumbler from their lockingpositions except upon the breech -bolt being completely closed. j V

6. A trigger-device 'comprising in combination with the trigger and amovable trigger-pin, a firing pin having a projection and a scar havingmeans to engage with said projection and lock thereby said firing pin inits cocked position, the said projection comprising a spring pawladapted to move out of the way of the sear.

In testimony whereof I afiix my signature 100 in presence of twowitnesses.

RUDOLF FROMMER.

Witnesses:- LILIAN FUIOP,

LESLIE S sAsz.

firing pin, locking it in cocked position,

